Two different meanings of the term “afterburn” provided the inspiration for this adrenaline-packed work. The first is an intense and exhausting sensation that follows vigorous exercise (primarily caused by the need to take in more oxygen to help the body recover). The second refers to the use of afterburners in jet engines (typically used in military supersonic aircraft), which provides an incredible boost in thrust compared to a typical jet engine. In both cases, the core element involves the use of tremendous energy in an effort to become stronger and faster.